Compositions of triblock copolymers styrene-butadiene-styrene with low styrene content, oil extended, and articles made therefrom

摘要

A composition of a polymer blend oil extended, comprising: a) a triblock copolymer of styrene-butadiene-styrene elastomer linear, having triblock copolymer a styrene content in the range of 15 to 23 weight percent, based on the weight of the block copolymer, and a molecular weight within the range of 90,000 to 130,000; b) a thermoplastic polymer selected from the group consisting of a homopolymer of styrene, a polymer of ethylene, polypropylene, a polymer based on propylene, and copolymers of ethylene / vinyl acetate copolymer having an ethylene content within the range of 70-93 weight percent, based on the weight of ethylene / vinyl acetate; c) an extender oil, the extender oil being present in an amount within the range of 4 to 20 weight percent, based on the total weight of the composition.